// decodeURI/decodeURIComponent:可对 encodeURI/encodeURIComponent 函数编码过的 URI 进行解码。
let s1 = "Hello%20%40%23%26%3D%2B%24%20World%20!!!";
let s2 = "Hello%20@#&=+$%20World%20!!!";
let res1 = decodeURIComponent(s1);
console.log(res1); // Hello @#&=+$ World !!!
let res2 = decodeURI(s2);
console.log(res2); // Hello @#&=+$ World !!!
